import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from "@/components/user/Users"
Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect:'/login',
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children:[{ path:'/welcome',component:Welcome },
      { path: '/users',component: Users }
    ]
  }
]

const router = new VueRouter({
  routes
})
// 挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  // to将要访问的路径
  // from代表从哪个路径跳转而来
  // next是一个函数，表示放行
  // next() 放行  next('/login')  强制跳转
  if (to.path =='/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})
export default router
